1996 gsxr ran fine without ram air ducts after the carbs were cleaned. Then once i installed the ram air ducts, it starts sputtering after it gets a little speed up. Please help!!
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When was the last time you ran it Prior to this problem? When you rebuilt the Carb, did you pull out the plastic plug on the top of the carb? Many B&S carbs has a air plug up top that clogs. When gummed up, it causes surging. Did you clean all the tiny holes in the Jet and Emulsifier?
If the motorcycle has sat more than 6 months with reformulated gas, it more likely has jets plugged up and will need a carb cleaning. Plug jets will cause sputtering and bogging down when the engine is loaded.
Previous owner had way overfilled crankcase oil. Oil had gotten into carb and clogged air filter. Drained oil to correct level. Ran engine but kept cutting off-see above. Took off carb cover cleaned housing and ran without air filter-ran fine. Unsuccessfully tried to clean air filter with gas-did not work. Apparently, the engine could run just long enough to exhaust the air in the old filter and cut off which is why it would start back up after a few seconds. Bought new air filter-whole thing-about $15 at Carquest. Put in some carb cleaner and installed the new filter and it runs perfectly.
that might be the overflow tube and should not be hooked to anything, it's like a emergency drain for the carb and when you hooked it to the filter is pulling gas out of the carb at high motor speeds causing it to sputter .. jay
Take the carburetors apart and clean them. There is probably water caused white corrosion in the fuel needle assemblies. Once the needles are cleaned the fuel should pump and flow through the carburetors again.
Replace fuel filter after cleaning tank thouroughly, to clean tank remove fuel line at carb. Drain all fuel then leave line loose until you flush tank with carb. Cleaner then blow out tank with compressed air. Now install new fuel filter and check your fuel can for trash and water better yet just add fresh fuel.
It should start fine - unless you have drawn gunk from the bottom of the tank into the fuel line, in which case you will need to strip and clean the carbs.
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